C language uses fork to create new processes

Available for Unix/Linux :

/*
Example: create a new process using fork in C language

Linux
*/

#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <string.h>
#include <stdbool.h>
#include <errno.h>
#include <unistd.h>

int main(void)
{
    pid_t my_pid;
    pid_t pid;

    printf("Before fork\n");
    pid = fork();
    if (pid == -1)
    {
        perror("Error:");
        return (1);
    }
    printf("After fork\n");
    my_pid = getpid();
    printf("My pid is %u\n", my_pid);
    return (0);
}